That's really simple! All you have to do is make 2 common events for each char. They are
1.Show (Char name)
2.Erase (Char name)
For the first common event, make a show picture event. This is supposed to be called for before you talk.
Choose the graphic you want to use and make the number 1.
You will need to change the number to 2 for the next graphic and so on and so on...
Anyway... You'll have to change the constant to X:80 and Y:20. That the first part done.
For the second common event, this is supposed to be called for when you want to make the picture go away, make an erase picture
event. Just choose that picture's number and there you go!
Tell me if you didn't understand that or if you have any questions.